added jsontype usage example into docs
added jsontype usage example into docs

janhenkgerritsen/Codeception,Naktibalda/Codeception,tasselchof/Codeception,Codeception/base,kt81/Codeception,TehJoE/Codeception,sergeyklay/Codeception,pitpit/Codeception,Naktibalda/Codeception,orhan-swe/Codeception,Codeception/base,Codeception/Codeception,tiger-seo/Codeception,janhenkgerritsen/Codeception,pitpit/Codeception,Vreasy/Codeception,Codeception/base,tasselchof/Codeception,tasselchof/Codeception,hubbyist/Codeception,hubbyist/Codeception,kt81/Codeception,Vreasy/Codeception,TehJoE/Codeception,Codeception/Codeception,tiger-seo/Codeception,sergeyklay/Codeception,orhan-swe/Codeception,Naktibalda/Codeception